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Finding the Fourth Proportional to 1,780.58, 2,457.21 and 994.63

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Solution

The fourth proportional to 1,780.58, 2,457.21 and 994.63 is: 1,372.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.58 : 2,457.21 = 994.63 : x
  2. Step 2: Convert to fraction form
    1,780.58/2,457.21 = 994.63/x
  3. Step 3: Cross multiply
    1,780.58x = 2,457.21 × 994.63
  4. Step 4: Simplify right side
    1,780.58x = 2,444,014.18
  5. Step 5: Solve for x
    x = 2,444,014.18/1,780.58
  6. Step 6: Final answer
    x = 1,372.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.